The easiest way might be to use sessions. Just simply when they submit the initial form submit that data into session variables and simply pull the data from there when needed.
Cause im certain just using a link you wouldnt be able to resend post data and only send get. The only way to repost would most likely be using a form with hidden fields and a submit button but wouldnt look the prettiest most likely.
So yea, try sessions unless someone else has a better suggestion.